After double checking a couple of things, I have 2 concerns about the coticule that give me pause.

First, they're about 60% more expensive for an edge that, from what you say, sounds like it's only marginally better.

Second, and please correct me if I'm wrong, it seems to me that using a 1.5" wide stone, and depending on slurry would be less consistent than an oil or water stone that is nearly as wide as the length of the blade.

Doesn't really sound like a good bang for my buck.